Of the people with relevant real-world knowledge and experience of the technologies involved, exactly zero of them agree with your assertion that adding more RAM will help.

Yes, the servers are an issue. But do you know what is on those servers that determine how they work and communicate with clients (your computer)? Code. Do you know what is on your client (the game) that tells it how to communicate with the server? Code. If you are dev and you know for a fact that there are problems with the code on the client, server, or both, that is faulty, you would not slap more RAM into a server and call it a day.

Now, mix that with the fact that the "servers" are actually dynamically spun-up virtual instances hosted by a third-party service provider, and you run into a whole new set of issues to worry about.

In short, no matter how much you believe adding another stick of RAM to the server will fix the problem, it's just not true.

Source: I'm an enterprise systems architect and have to constantly tell customers that their "Nephew who really knows computers" doesn't know actually know anything at all.